New Hampshire Dams
664 dams tracked by the National Inventory of Dams
Total Dams
664
High Hazard
162
24.4%
Poor / Unsatisfactory
152
Average Age
100 yrs
Hazard Classification
High162 (24.4%)
Significant185 (27.9%)
Low300 (45.2%)
Condition Assessment
Satisfactory267 (40.2%)
Fair169 (25.5%)
Poor / Unsatisfactory152 (22.9%)
Not Rated76 (11.4%)
Federal
22
State
170
Local
195
Private
261
Tallest Dams
- Comerford 170 ft
- Moore 149 ft
- Otter Brook Dam119 ft
- Franklin Falls Dam116 ft
- Everett Dam115 ft
High Hazard Dams
- Comerford High
- Moore High
- Otter Brook DamHigh
- Franklin Falls DamHigh
- Everett DamHigh
Poor Condition Dams
All Dams in New Hampshire
Showing 51–75 of 169
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pine River Pond Dam Carroll County | 14 | — | Significant | Fair |
| Pine Island Pond Dam Hillsborough County | 19 | 1896 | Low | Fair |
| Pheasant Ridge Cc Pond Dam Belknap County | 25 | 1976 | Significant | Fair |
| Peterborough Treatment Lagoon Dam Hillsborough County | 9 | 1972 | Significant | Fair |
| Perkins Pond Dam Cheshire County | 7 | 1935 | Low | Fair |
| Pequawket Pond Dam Carroll County | 15 | — | Low | Fair |
| Pearly Pond Dam Cheshire County | 7 | 1935 | Low | Fair |
| Pea Porridge Pond Middle Little Dam Carroll County | 17 | 1966 | Significant | Fair |
| Paper Mills Holding Pond Dam Cheshire County | 20 | 1974 | Significant | Fair |
| Oyster Reservoir Dam Strafford County | 21 | 1934 | Significant | Fair |
| Otter Brook Dam Hillsborough County | 10 | 1928 | Low | Fair |
| Ossipee Lake Dam Berry Bay Carroll County | 12 | 1919 | Low | Fair |
| Osgood Pond Dam Hillsborough County | 9 | 1861 | Low | Fair |
| North Village Dam Hillsborough County | 12 | 1836 | Low | Fair |
| North River Pond Dam Rockingham County | 8 | 1932 | Low | Fair |
| Nippo Pond Dam Strafford County | 9 | 1930 | Low | Fair |
| Mwh Sewage Lagoons Dam Coos County | 19 | 2000 | Significant | Fair |
| Mud Pond Dam Cheshire County | 18 | 1899 | Low | Fair |
| Mud Pond Dam Coos County | 10 | 1920 | Low | Fair |
| Mountain Pond South Dam Belknap County | 7 | 1913 | Low | Fair |
| Mountain Pond North Dam Belknap County | 14 | 1913 | Low | Fair |
| Mountain Pond Dam Hillsborough County | 13 | 1930 | Low | Fair |
| Mountain Brook Reservoir Dam Cheshire County | 18 | 1951 | Significant | Fair |
| Morgan Pond Dam Sullivan County | 12 | 1939 | Significant | Fair |
| Morey Pond Dam Merrimack County | 12 | — | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.